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, , (), (1)CH102008037383, 2008037377, 2008037371, 2008037359,
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1887167818011672 187319001905
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10km
ABC
(Time of flight)
. (law of reflection) ..
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(retroreflection) . (:) , () . .
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(index of refraction) n
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70% 95%. 100% .
100%
1) 20.1 . , , . (2MHz, 12Vpp ) , +6V 5[nsec] . . .
Optical Path Length Lch1EXT Trigger InputFunction Generator (Pulse Driver, Square Wave, 2MHz, 15Vpp)Optical Pulse Generator w. Magnetic MountTrigger OutputMain OutputPhoto-detectorSteel Plate for Magnetic Base MountingDC Power Supply(+6V)BNC T-adaptor and 50 ohm TerminatorPulse Time Delay tdReference Pulse: Reference Time(A position)(A position)Delayed Pulse(B position)3m Coaxial CableOscilloscope (10nsec/div, 10mV/div, EXT Trigger)
td . L . 3m CH1 . (BNC T-adaptor 50 ) .( ) (TRIG. INP.) EXT .
2) (A position) . 1~50mv/div, 10~100nsec/div . 10nsec/div 10 (x10) . , . . 1m (B position) , (1m ) td . 1m 3m .
3) 2) , . Logger Pro 3 L[m], td[sec] . . 1/c*x c . c = 3X108[m/sec] .4) ( ) ?
5) v . 1)~2) 1m td, . 1m . 1m ( ) . . ? .6) v . 1)~2) 1m td, . 1m . . ? .
7) 10 B. ( ) . 2 .
1) 10.3 . 10.4 . LD , , D ( ) ( ) . , D , D . ()-->() , .
D-LensLaser Diode Light SourceScreen(a) Rotational TableOptical Rail
(b) D-LensLaser Diode Light SourceScreenRotational TableOptical Rail
2) LD , . . D D . , 1 0 r 0 LD D . . 0, 0 2 . .
3) D 10 , . 10 80 . 10.1 . D 10 , . 10 80 . 10.1 .4) n2 .
1) 10.5 . LD, , D ( ) ( ) . , D , D . ()-->() .
D-LensLaser Diode Light SourceRotational TableOptical RailScreen
2) LD , . . D D . , 1 0 r 0 LD D . . 0, 0 2 . .
3) D 10 , . 10 40 . 10.2 . D 10 , . 10 40 . 40 50 90 , .
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